Needle-motion for sewing-machines.



A TTORNEY PATENTED AUG. 14, 1906.

C. M. ABEROROMBIE. NEEDLE MOTION FOR SEWING MACHINES.

APPLICATION FILED JUNE 21.1905.

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WITNESSES 4% INVENTOR ,Q 4 a M N0. 828,294. PATENTED AUG. 14, 1906. G. M. ABERCROMBIE.

NEEDLE MOTION FOR SEWING MACHINES. APPLIGATION FILED mm: 21, 1905.

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CHARLES MACKENZIE ABERCBOMBIE, OF BRTDGEPORT; CONNECTICUT. ASSIGNOR TO WHEELER & WILSON MANUFACTURING COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

NEEDLE-MOTION FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Aug. 14, 1906.

. i n m at. 21.1905. Serial No. 266.306.

eral movements transverse to the feed of the material, as in the ordinary zigzag, hemstitch, and variety-stitch sewing-machines.

The inventionconsists of a reciprocating needle-bar provided with a vibrating needlecarrier and means to positively control and guide its vibration, such means including a guide-rod fixed to the needle-carrier by one end and rising therefrom and having a sliding connection with a sleeve which is swiveled in an arm or crank pivoted on the head of the machine, the swivel-sleeve being connected by a rod with a'rotary-cam driven from some moving part of the machine, such as the nee.- dle-actuating shaft, whereby the needle is positively vibrated in both directions, and therefore may be run at high speed without dan er of cramping. 7 The invention is shown and described in connection with the Wheeler & Wilson hemstitch sewing-machine as an illustration and without thereby limiting its applicability and sccipe.

n the accompanying drawings, illustrating the invention, in the several +figures of which like parts are similarly designated,

. the bed-plate bein Figure 1 is a front elevation, the face-plate removed, the arm broken away in part, and the frame shown partly in section and partly in dotted lines. Fig. 2 is a front end elevation, shown in cross-section alongside of the fee Fig. 3 is a vertical secvibrating mechanism. Fig. 4 is aperspective view of the needle-carrier detached. Fig. 5 is a partly-sectional elevation of the needlecarrier and cross-head looking toward the left, Fig. 1.

Parts shown and not particularly described may be of the construction herein illustrated or of any other approved form, it being understood that, as usual, the cloth-feeding mechanism is capable of imparting two forward-feed movements to the material alternating with one backward-feed movement, that the needle is moved laterally to place tWo stitches off the hem fold and one on, and

that a piercer is provided to enlarge the offhem needle punctures.

1 is the bed-plate 2, the overhanging arm, in which is mounted the needle-actuating shaft 3, and 4; is the needle-bar mounted in the head 5 of the overhanging arm and connected through the needle-bar stud-collar 6, link 7, take-up cam 8, and take-up cam-stud 9 with the needle-actuating shaft 3.

10 is the needle-controlling cam-connected.

with the needle-actuating shaft 3 through the bevel-gear 11, mounted on the needle-actuatingshaft and meshing with suitable gearteeth (not shown, but as usual) formed on the cam 10, the ratio of said gears being as three to one,

' 12 is across-head secured by screws 13 to r the needle-bar.

14 is the needle-carrier, pivotally mounted upon the cross-head and secured by a screw 15. This needle-carrier is L-shaped, one arm.

16 of'which carries the needle 17, and the other arm 18 has secured to it by a screw 19 a guide-rod 20. This guide-rod passes 28 is a connecting-rod, the end 29 of which i encircles the stud-shaft 22 and its opposite end adjustably secured to a lever 30, mounted in a suitable bearing in the overhanging arm, the free end of said lever being provided with a roller 31, which tracks a groove 32,

formed in the face of the cam 10, which camgroove, through the connections 30, 28, 21, 20, and 14, transmits to the needle lateral -movements in a manner to effect one stitch on the hem fold and two stitches off the hem fold.

A piercer 33 is secured by screws 34 to an adjustable bracket 35, Secured. by screw 36 to the cross-head 12, carried by the needlebar, such piercer actuated to puncture the material off the hem .fold at every descent of of the needle.

The needleactuating shaft 3 controls the vertical movements of the needle-bar 4, and

the cam 10 controls the lateral movements of seam, and hence the liability of the guide-rod to become cramped in the swivel-sleeve 21, through which it passes, is practically eliminate i What I claim is' I 1. In a needle-motion for sewing-machine's, a reciprocating needle-bar provided with a pivoted needle-carrier, a guide-rod fixed to said needle-carrier, an oscillating crank, a sleeve swiveled in the free end of said crank "and with which swivel-sleeve the guide-rod has a sliding connection, a rotary cam, and a connecting-rod between said cam and swivelsleeve.

2. In a needle-motion for sewing-machines,

- a reciprocating needle-bar, a needle-carrier ivotally connected therewith, a guide-rod ed to said needle-carrier, a swivel-sleeve through which said guide-rod slides as the support for positively oscillating the support 7 and thereby vibrating the needle-carrier.

3. In a needle-motion for sewing-machines, a needle-bar, a needle act'uatin shaft and connections between said nee le-bar and shaft, a pivoted needle-carrier, a rotary cam, and connections between said cam and needle-carrier for positively vibrating said needle-carrier including a swivel-sleeve, an adjustably-mounted connectin -rod between said swivel-sleeve and cam an a slidable connection between said sleeve and needle-carrier, said sleeve capable of rocking movement and a su ort in which said sleeve is mounted to rocli, said support having an independ ent axial movement whereby the sleeve is adapted to oscillate in the arc of a circle.

4. The combination of a pivoted needle carrier, a guide-rod fixed to it, a swivelsleeve with which the guide-rod has slidable connection, an oscillating crank in which the swivel-sleeve is mounted, and positively-act'- ing means to vibrate the guide-rod with the axis of the crankas a center.

In testimony whereof I have hereunto set my hand this 17th day of June, A. D. 1905.

' CHARLES MACKENZIE ABERCROMBIE. Witnesses F. W.- OsTRoM, A. DONIHEE. 

